The association of nodule bacteria with leguminous roots is known as:

Related Mcqs:

1. A symbiotic association between fungus and roots of higher plants is known as:

   A. Lichen
   B. Mycorrhiza
   C. Mutualism
   D. None of these

2. The bacteria, which reduce nitrates in the soil to gaseous nitrogen, are known as denitrifying bacteria such as:

   A. Nitromonas
   B. Pseudomonas
   C. Nostoc
   D. Rhizobium

3. The mycorrhizae present in association with higher plant roots are best described as:

   A. Keystone species
   B. Edge species
   C. Critical link species
   D. Edaphic pod species

4. A bacterium found in the root nodules of leguminous plants is the:

   A. Clostridium
   B. Azotobacter
   C. Nitrobacter
   D. Rhizobium

5. Relative to shoots, the roots can be very massive in plants of:

   A. Deserts
   B. Lakes and ponds
   C. Mixed temperate forests
   D. Mixed tropical forests

6. Reduction of mechanical and vascular tissue and poor roots are found in:

   A. Hydrophytes
   B. Xerophytes
   C. Halophytes
   D. None of these

7. The zone of soil showing microbial activity around the roots of higher plants is called:

   A. Rhizosphere
   B. Rhizoplane
   C. Soil microflora
   D. All of these

8. The symbiotic association in which one partner gains benefit without benefiting or harming the other is known as:

   A. Commensalism
   B. Lichen
   C. Mutualism
   D. None of these

9. An association between a fungus and an alga is known as:

   A. Lichen
   B. Mycorrhiza
   C. Mutualism
   D. None of these

10. An association between two organisms belonging to different species, which live together for mutual benefit or on partner gets benefit and other, is neither benefited nor harmed is known as:

    A. Predation
    B. Parasitism
    C. Symbiosis
    D. None of these